Beyerdynamic T 51 I repair

I could get the T 51 i with broken cable from a friend. I read, that the cables are not plugged. Does anybody know how to repair?

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0